SY/T 5560-1992 Evaluation procedure for defoamers used in drilling fluids
Some standard content:
SY/T5560-92, Petroleum and Natural Gas Industry Standard of the People's Republic of China
Evaluation Procedure of Defoamers for Drilling Fluids
Published on February 22, 1993
Ministry of Energy of the People's Republic of China
Implementation on August 1, 1993
1 Subject Content and Scope of Application
Evaluation Procedure of Defoamers for Drilling Fluids, Petroleum and Natural Gas Industry Standard of the People's Republic of China
SY/T 5560-92
This standard specifies the reagents and materials, instruments and equipment, operating procedures, result methods, precision and other requirements for evaluating defoamers for drilling fluids.
This standard is applicable to the evaluation of defoamers for drilling fluids. 2 Principle and Summary
When the drilling fluid foams, its density decreases, and when the bubbles gradually disappear, its density gradually increases. The quality and amount of the defoamer directly affect the degree of density recovery. This principle can be used to evaluate the quality of the defoamer. The simple operation is: first prepare four freshwater (or salt water) drilling fluids with specified apparent viscosity and pH value, place them for 24 hours, stir one of them at high speed for a specified time, measure its apparent viscosity (whether it meets the requirements), place them for a specified time, and measure its density. Add a foaming agent of a specified base to another part, stir it at high speed for a specified time, place it for a specified time, and measure its density. Add a specified amount of foaming agent to three parts, stir it at high speed for a specified time, add a specified amount of defoaming agent, and stir it at high speed for a specified time. Place it for a specified time, measure its density, and calculate its density recovery rate according to formula (1) based on,, and d. 3 Reagents and materials
a, sodium bicarbonate: chemically pure
, sodium dodecylbenzene sulfonate: chemically pure
, sodium cyanide, chemically pure,
d. Sodium hydroxide: chemically pure:
e, Evaluation soil: performance indicators that meet the SY5444 standard for evaluation soil for drilling fluids: f. High viscosity carboxymethyl cellulose purple sodium salt: performance indicators that meet the SY5093 standard for carboxymethyl cellulose sodium salt (Na-C.MC) for drilling fluids (high viscosity)
, Salt water: weigh 40g of sodium fluoride and dissolve it in distilled water, and dilute it to 1L*, its density is 1.040/cmh, Dialkyl benzene sodium magnetic acid solution: weigh 20g of reagent and dissolve it in distilled water (if it does not dissolve, slightly heat it), and dilute it to 200ml; i, Distilled water: Grade 3:
3. Defoaming agent to be tested.
4 Instruments and equipment
a. Commercial reverse stirrer: the speed under load is 11000r/min, the stirring shaft is equipped with a single corrugated blade, the blade diameter is 2.5cm, the mass is 5.5mm, there is a sample cup, its height is 18cm, the upper end diameter is 9.7cm, the lower end diameter is 7.0cm, it is made of stainless steel or other corrosion-resistant materials,
Approved by the Ministry of Energy of the People's Republic of China on February 22, 1993 and implemented on August 1, 1993
SY/ 5560-92
b. Electric rotation viscometer, in line with the performance indicators of SY/T5377 electric rotation viscometer standard c, stopwatch: graduation value is 0.1s
d, mud density meter: measuring range is 0.7~2.4g/cm, graduation value is 0.01g/cm; c, shelf drug balance: 1000g, sensitivity is 0.5g, 200g, sensitivity is 0.1g; F, torsion balance: sensitivity is 0.01g#
g. Graduated pipette: 1ml, graduation value is 0.01ml, 2ml, graduation value is 0.2ml. 5 Operating steps
5.1 Preliminary test
5.1.1 Prepare four portions of fresh water drilling fluid: weigh 400.0g of distilled water, 1.20g of sodium bicarbonate, and 60.0g of evaluation soil in a sample cup by differential subtraction, and disperse them with a glass press. After stirring at high speed for 20min (stop twice in the middle to scrape off the adherent materials on the sample cup), add 0.60, 0.80, 1.00, and 1.20g of high-viscosity sodium carboxymethyl cellulose respectively, and stir at high speed for 20min (stop twice in the middle to scrape off the adherent materials on the wall of the sample cup). After leaving it for 24h, stir at high speed for 3min, measure its apparent viscosity, and draw a relationship diagram of apparent viscosity against high-viscosity sodium carboxymethyl cellulose in rectangular coordinates. From the graph, determine the concentration of high-viscosity sodium carboxymethyl cellulose (g/L) when the apparent viscosity is 20mPa·s.
5.1.2 Use 416g of salt water instead of distilled water, the amount of high viscosity methyl thiazolin sodium salt added is 1.60, 2.00, 2.40, 2.80%, the amount of high viscosity carboxymethyl cellulose sodium added when the apparent viscosity is 221mPa·s (g/L), and the rest are the same as 5.1.1. 5.2 Freshwater drilling fluid test
5.2.1 Prepare four portions of fresh water drilling fluid: weigh 300.0g of distilled water in the sample by subtraction method, add 0.90g of sodium carbonate, 45.0g of evaluation soil, stir at high speed for 20min (stop twice in the middle and scrape off the adhesion on the wall of the sample cup), add the amount of commercial methyl thiazolin sodium salt determined by 5.1.1 (i.e. g/×0.3), stir at high speed for 20min (stop twice in the middle and scrape off the adhesion on the wall of the sample cup), and let it stand for 21h.
5.2.2 Stir one portion of the drilling fluid at high speed for 3.0 min, let it stand for 10.0 min, and determine its density d1. 5.2.3 Add 0.10 ml of dialkylbenzene sulfonic acid solution (3.h) to another portion of the drilling fluid, stir it at high speed for 3.0 min, let it stand for 10.0 min, and determine its density d2o
5.2.4 Add 0.10 ml of sodium dialkylbenzene sulfonate solution (3.h) to the third portion of the drilling fluid, stir it at high speed for 3.0 min, immediately add the optimal amount of defoaming agent, stir it at high speed for 10 min, let it stand for 10.0 min, and determine its density ds. 5.2.5 Stir the drilling fluid prepared in 5.2.4 at high speed for 5.0 min again, let it stand for 10.0 min, and determine its density a:. 5.2.6 The fourth portion is a parallel sample of the third portion. 5.3 Salt water drilling fluid test
5.3.1 Replace the steaming water with 312g salt water and add the amount of high viscosity carboxycellulose sodium salt specified in 5.1.2 (i.e. g/L×0.3). 5.3.2 Add 1.0ml sodium diphenylbenzene sulfonate solution. 5.3.3 Add the optimal amount of defoamer, which can be different from 5.2 and 4. 5.3.4 It is alternated with 5.2.
6 Expression of results
9= Three d ×100
formula: density recovery rate, d
di——density of drilling fluid before foaming, g/cm2, &2density of drilling fluid after foaming, gctm
SY/T5560-92
let. -—density of drilling fluid after defoaming, denominium/cm2. Under the given optimal defoamer dosage (g/L), calculate the density recovery rate of the first and second times according to formula (1). 7 Precision||t t||When the difference between the density recovery rate (including the first and second times) of the parallel test of freshwater drilling fluid does not exceed 3.0%, take the arithmetic mean value, otherwise repeat the test.
When the difference between the density recovery rate (including the first and second times) of the parallel test of salt water drilling fluid does not exceed 40%, take the arithmetic parallel value, otherwise repeat the test. wwW.bzxz.Net
8 Others
8.1 If the test is performed with H of 12, just add the magnetic acid nitrogen sodium of the freshwater drilling fluid. 0.9g/300ml is changed to 0.2g/300ml of sodium hydroxide; 0.9g/300ml of sodium hydrogen carbonate in brine drilling fluid is changed to 0.3g/300ml of sodium hydroxide, and the rest is done according to the fifth step.
8,2 Due to the different products of different manufacturers, the impact on the performance of drilling fluid is different. Before use, the apparent viscosity and filter tip volume of the drilling fluid after defoaming of each product should be determined. The difference between the original drilling fluid and the original drilling fluid should be used as a supplement to the drilling fluid performance. 8.3 Since the physical and chemical properties of various defoamers are different, there are solids, granules, granules, liquid-solid mixtures and liquids, etc., so there must be various physical and chemical performance indicators and corresponding test methods. Additional remarks:
This standard was proposed by the Petroleum Drilling Process Professional Standardization Committee and drafted by the Drilling Technology Research Institute of the North China Petroleum Pipeline Bureau. The initiators of this standard are Yao Lunbing, Chen Lianliu, Liu Jing, Lv Fuhua and Zhu Lanjing. 3
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.